Torch device



.1. J. cRow'E' TORCH DEVICE May 31,- 1932 Filed Dec. 16, 1929 2Sheets-Sheet l i INVENTOR,

A TORNEY- J. J. CROWE May 31, 1932.

TORCH DEVICE Filed Dec. 16. 1929 2 Sheets-Sheet 2 H s 4 H lllll flZINVENTOR AT ORNEY Patented May 31; 1932' UNITED "STATES PATENT OFFICEJOHN J. CROWE, OF WESTFIELD, NEW JERSEY, ASSIGNORQO AIR REDUCTIONCOMPANY, INCORPORATED, OF NEW YORK, N. Y.',' A CORPORATION OF NEW YORK'roncn DEVICE Application filed December 16, 1929. Serial No. 414,436.

The tips of cutting torches used for severing metal are designed todeliver a high velocity stream of oxygen. In my copending applicationSerial No. 411,239, filed December 3, 1929, I have disclosed a tip and amethod of cutting wherein narrower kerfs and greater efliciency aresecured by delivering the cutting stream through an orifice thedivergence of which is such as to translate substantially all thepressure of the gas into kinetic energy. Thereby the velocity of theissuing stream is greatly increased and its width is reduced, because itspreads littl or not at all on leaving the tip.

The Walker Patent 1,726,327 of August 27, 1929, discloses a torch tiphaving a flaring exit but adapted for atotally different kind ofoperation, calling for a broad, spreading I stream of oxygen of loweredvelocity. The present invention relates to torchtips of that class, theobject being to insure the delivery of an exceptionally wide stream. Theuses.

of such a tip include the gouging out of defects in billets and bloomsand the burning away of rivet heads. For the latter purpose the broadstream is applied directly to the face of the rivet head, preheated bythe familiar heating jets, with the result that part or all of the headis quickly consumed without injury to the plate beneath.

In this invention I make use of a large oxygen passage provided with aflaring downstream portion adapted to deliver a large oxygen stream, asin the Walker patent, but in order to compel the stream to fill theflaring exit and to spread even more widely a device is inserted in theoxygen passage behind the flare or within the flare itself. This device,which may take several forms, may have a passage which delivers acentral portion of the flow substantially undeflected and therefore athigher velocity .than the surrounding',portion of the stream. In theaccompanying drawings, forming part hereof: Fig. 1 is a a torch head andof a tip therein embodying one form of the invention; 7/ Q Fig. 2 is anenlarged side elevation of the twisted blade device shown in Fig. 1;

- gen stream is delivered from amuch enlarged longitudinal section ofpart of Fig. 3 is a fragmentary longitudinal section of a torch tip inwhich vanes having twisted tips are employed for producing a vwhirlingmotion of the-oxygen and causing consisting of a plug having passagesdrilled to direct the oxygen into the flaring chamber in tangentialdiagonal directions;

Fig. 7 is an enlarged side elevation of the device shown in Fig. 6; I

Fig. 8 is a plan view of Fig. 7 Fig. 9 is a view like Fig. 3 showing apro peller form device'supported in the narrower portion of the flare;Fig. 10 is a view like Fig; 3, the deflecting device employed being abody supported in the flaring exit; v

Fig. 11 is a similar view, showing the deflector provided with a centralthrough passage;

Fig. 12 is an enlarged longitudinal section of the device shown in Fig.11; and v Fig. 13 is a fragmentary longitudinal section of a tipcontaining a device like that shown in Figs. 10 12, but having a centrallongitudinal passage terminating in inclined exits.

The tips, which are marked 2 in the several views, have large centraloxygen passages 3, the, downstream portions 4 of which are broadened ina decided flare, so that the oxyround opening in theextremity of thetip. The tips have usual preheating jet passages 5, which may beprovided at the rear end of the tip with inlets 6 and 7 for oxygen andfuel gas, respectively. The tip is adapted to be inserted in a cuttingtorch head 8 having supply'passages 9, 10 and 11 for cutting, oxygen,heating oxygen. and fuelgas, re-

spectively.

In Fig. 1 a twisted strip of metal 12: is inserted firmly into thepassage 3 just behind the flaring portion 4 and projecting into thatportion. This device deflects the oxygen stream, causing it to whirl andspread out 100 evenly in the flaring exit, so that the mouth is filledby the-stream. The stream which issues from the tip is consequently aswide as the delivery opening and tends to spread even more widely.

In Fig. 3 a four-winged vane device 12 is introduced into the oxygenpassage at the narrow end of the flare, the tips of the vanes beingtwisted to produce an effect similar to that ust described.

In Fig. 6, the means for directing the oxygen outward to the wall of theflaring exit is a plug l2 having diagonal passages 13 drilled in planesthat may be described as tangential, in order to impart a whirling orlateral motion to the oxygen on entering the flare.

In Fig. 9 a propeller like device 12 is supported within the flaringexit by a stem 14 held in spiders 15. This device may be eitherstationary or rotary.

I In Fig. 10 a pear-shaped body 12 on the end of a stem 16 is supportedfrom spiders 15; This body is disposed within the narrow end of theflare andserves to deflect the oxygen flowing around it outward to thewall of theflare. Devices of other shapes and sizes for spreading theoxygen stream may be employed, and their location is not confined to thenarrow end ofthe flaring exit.

In Fig. 11 the body 12 and its stem have a straight central passage 17for conducting a central portion of the stream and delivering it in theaxial direction within the flare. In this way the broad stream of oxygendischarged from the tip may bevcaused to have surrounding gas.

' In Fig. 13, a similar form of a device 12 has a central passage 17which branches into a plurality of inclined exits'18 opening through thesides of the bulbous body. By varying 'the direction of these exits thespreading effect can be made more or less pronounced. and varyingdegrees of turbulence can be produced.

Other forms of the invention will suggest themselves.

I claim:

1. A torch device of the character described having an oxygen passageprovided with an enlarged downstream portion terminating in a large-oening from which-the oxygen stream is dellvere'd into the atmosphere,and

means for directing the oxygenoutwardin saidzenlarged portion in orderto insure a w1de issulni stream. s j J -2'. torch deviceof the characterdescribed having'an oxygen'passage provided with a v at the reglon 0said flaring p the oxygen outward to the wall of said p01-,

tion in order to insure a wide issuing stream.

. flaring downstream portion alargeo enin and means in said passagetirminating in tion to direct 3 A torch device of the characterdescribed havlng an oxygen passage provided with a flaring downstreamportion terminating in a large opening, and means in said passage at theregion of said flaring portion to impart a swirling motion to theoxygen.

4. 'A torch device of the character described having an oxygen passageprovided with a flaring downstream portion terminating in a largeopening, and a twisted member in said passage at the region of saidflaring portion.

5. A torch device of the character described structed to direct theoxygen outward to the.

wall of said portion and also having a channel for directing a centralpart of the flow into said flaring portion substantially withoutdeflection.

7. A torch device of the character described having an oxygen passageprovided with aflaring downstream portion terminating in a largeopening, and a device in said passage at the region of said flaringportion constructed to direct the oxygen in part outward to the wall ofsaid portion and to deliver a central a core traveling at highervelocity" than the portion of the stream in amore forward di;

rection.

